In the previous article we mentioned the technique of quickly '"invisible watermark", a technique that would allow us to prove paternity of a digital photograph. The operation (as already described) is simple. The underlying principle of all is to have a picture "x" (my original photo I just have to keep) and create a picture "and" (the photo that contains the watermark invisible to circulate in internet). To prove to be the author of the photo just to compare a particular procedure by superimposing the two graphics immagni. Magically comparirà il watermark with our name and copyright information.

Those who describe today are the most common methods that allow us to, in the event of litigation, of resolve the issue related to copyright images.

The International Law (to Berne Convention for the Protection of Literary and Artistic Works) states that the artistic rights to the work resulting from the ingenuity and creativity can be attributed to the people who made. Forever. This means that if today I compose a piece of music will always be my, I can decide whether to play it without receiving compensation, but the author is me and to me that specific work must always be attributed. The same mechanism applies to the photograph (on condition that the photo is understood as a 'artistic work).

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